Across
- 3. star a predatory animal with five or more rays (arms) extending from a central disc
- 4. the alternating rise and fall of the sea with respect to land
- 7. the point when seawater rises to its highest level during a tide cycle
- 8. anything that can cause harm to an ecosystem
- 9. all of the members of a species within a particular area
- 10. an organism that eats other organisms for energy
- 11. a visual that shows the network of food chains in an ecosystem
- 12. a community of different species that depend on interacting with each other and their physical environment for survival
- 15. – organisms that capture energy directly from the sun to make their own food; trees, grasses, and some microbes do this with photosynthesis
Down
- 1. drying due to the removal of water
- 2. the region of land that is covered and uncovered by water between high and low tides
- 5. – the point when seawater retreats to its lowest level during a tide cycle
- 6. marine animals with organs that gather energy by straining nutrients and small organisms out of the water
- 13. the place where land and water meet
- 14. any factor that reduces the ability of an organism to survive